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Cushion|Natural|GIA

1.30ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 2556450159

Certificate GIA 2556450159

Diamond specifications and retailer prices

From $5,979 AUD
As of November 6, 2026
Save $6,409 AUD (52%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $12,388 AUD at MOH London · As of November 7, 2026
View at MOH London

About this 1.3ct natural cushion diamond

This 1.3ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556450159. Listed at 20 retailers as of November 6, 2026, with prices from $5,979 to $12,388, a $6,409 spread on the same certified stone. MOH London lists it at $12,388. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.30
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle32.67°
Pavilion angle53.38°
OriginNatural
Grading LabGIA
CertificateGIA 2556450159
Dimensions7.93 × 5.64 × 3.89 mm
L/W Ratio1.41
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.93 mm5.64 mm1.30 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2556450159
Side View
Table 66.0%Crown 32.67°Girdle: MED-THKPavilion 53.38°Culet: NoneDepth 68.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $12,388 AUD|Low: $5,979 AUD|High: $12,604 AUD|Avg: $7,961 AUD|-1.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 10$5,979 AUD
Retailer 7$5,990 AUD
Retailer 12$6,616 AUD
Retailer 3$6,846 AUD
Retailer 11$7,159 AUD
Retailer 4$7,216 AUD
Retailer 6$7,574 AUD
Retailer 2$7,635 AUD
Retailer 8$8,798 AUD
Retailer 9$9,540 AUD
Retailer 5$9,849 AUD
MOH London$12,388 AUD

29 data points across 12 retailers

20 retailers$5,979 AUD to $12,388 AUD

B+
Cheapest Retailer
-
$5,979 AUD
A
Retailer 2
-
$5,990 AUD
View
B+
Retailer 3
-
$6,616 AUD
View
B+
Retailer 4
-
$6,637 AUD
View
B+
Retailer 5
-
$6,820 AUD
View
B
Retailer 6
-
$7,159 AUD
View
B
Retailer 7
-
$7,216 AUD
View
Final sale: no returns
B+
Retailer 8
-
$7,328 AUD
View
B+
Retailer 9
-
$7,574 AUD
View
Retailer 10
-
$7,596 AUD
View
Price last confirmed 22 days ago
B+
Retailer 11
-
$7,635 AUD
View
B
Retailer 12
-
$7,830 AUD
View
Retailer 13
-
$7,882 AUD
View
Price last confirmed 29 days ago
B
Retailer 14
-
$8,043 AUD
View
B
Retailer 15
-
$8,188 AUD
View
B
Retailer 16
-
$8,798 AUD
View
B
Retailer 17
-
$9,540 AUD
View
Retailer 18
-
$9,849 AUD
View
B
Retailer 19
-
$11,655 AUD
View
Most Expensive
B
MOH London
6D236D827 · Nov 7
$12,388 AUD
£6,702 GBP
View
19 more retailers have this diamond
Prices start from $5,979 AUDSave up to $6,409 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.30ct Cushion
$5,979 AUD